CN102792641B

CN102792641B - Communication equipment and method to set up

Info

Publication number: CN102792641B
Application number: CN201180012558.6A
Authority: CN
Inventors: 金井宽弥
Original assignee: NEC Corp
Current assignee: NEC Corp
Priority date: 2010-03-31
Filing date: 2011-03-29
Publication date: 2015-07-29
Anticipated expiration: 2031-03-29
Also published as: US9003026B2; EP2555473A1; EP2555473B1; EP2555473A4; JP5376047B2; WO2011121987A1; CN102792641A; US20120331136A1; JPWO2011121987A1

Abstract

In order to the supervisory frame that sends by means of only periodic and receive by the information Lookup protocol of Maintenance Entity endpoint device to communication equipment, and do not need the frame of special definition, Maintenance Entity endpoint device is equipped with: receiving system, receives supervisory frame; Management table, manages the identification information of the Maintenance Entity endpoint device of the transmission source as supervisory frame; And calling mechanism, when the identification information of the Maintenance Entity endpoint device of the transmission source of the supervisory frame received as receiving system unregistered in management table, by the identification information of described Maintenance Entity endpoint device registration to management table.

Description

Communication equipment and method to set up

Technical field

The present invention relates to communication equipment, communication system, method to set up, setting program and circuit is set, in network, with the state by carrying out supervisory network between Maintenance Entity endpoint device every scheduled time transmission and reception supervisory frame.

Background technology

Y.1731, ITU-T (standardization department of international telecommunication union telecommunication) defines the Ethernet OAM (run, administer and maintain) for runing, administering and maintaining in Ethernet TM with IEEE (IEEE) 802.1ag.In Ethernet OAM, supervision part is called ME (maintenance entity), can arrange ME for each MEG (Maintenance Entity) grade.Define 8 supervision grades 0 to 7 as MEG grade.In addition, end points MEP (Maintenance Entity end points) being set to the two ends in supervision part (ME) is needed.

In fig .15, what show ME and MEP arranges example.As shown in figure 15, ME (supervision part) is arranged between devices, and the MEP (end points) shown in black del is arranged on the two ends of supervision part.

In addition, ME and MEP has MEG grade as attribute, and is defined as the ME making to have lower MEG grade and does not cover the ME with higher MEG grade, as shown in figure 15.

Therefore, when operate Ethernet OAM frame performing operation, administer and maintain, need each ethernet communication equipment of the MEP initial registration of the MEG grade by the being in ME extremely MEP position of each supervision part (ME).In addition, there is following situation: the MIP (Maintenance Intermediate Point) of relaying supervisory frame is registered in the ethernet communication equipment be connected between MEP.

In addition, in order to shorten the failure detection time from unidirectional link failure, there is a kind of equipment, send and receiver normality inspection frame (for this reason defining especially), and, when the destination information based on frame searches for object earth's surface and therefore corresponding entry does not exist, the new adding purpose ground to object earth's surface, as usual learning process (for example, see patent documentation 1).

In addition, there is a kind of equipment, about the link aggregation management table of the configuration of the link aggregation in management level 2 switch, when breaking down in the port belonging to a link aggregation group, another Line cards making to have the port belonging to this link aggregation group upgrades link aggregation management table (such as with reference to patent documentation 2).

[patent documentation 1] Japanese Unexamined Patent Application Publication No.2009-135625

[patent documentation 2] Japanese Unexamined Patent Application Publication No.2008-244907

But, due to when above-mentioned MEP registration, need the corresponding ethernet communication equipment arranged separately by register information in the MEP position of each ME to network, need to arrange by maintenance terminal being connected to each ethernet communication equipment, or the storage card comprising register information is connected to each ethernet communication equipment, and loads register information.

Therefore, for the registration of MEP, each ethernet communication equipment needs to be equipped with the interface for arranging register information and CPU (CPU), worries that circuit scale becomes large and power consumption and cost increase.

In addition, large and complicated owing to will register to the register information amount of the MEP of each ethernet communication equipment, also worry that the mistake of register information is arranged.

In addition, in above-mentioned patent documentation 1, destination is added into the simple increase of Shi Biaozhong destination, object earth's surface number, to shorten failure detection time, and performs as usual learning process, consider and simplify circuit or reduce costs.

In addition, in order to shorten failure detection time, the link normality sending and receive special definition detects frame, but does not consider that the periodicity of supervisory frame uses.

In addition, table renewal rewards theory when above-mentioned patent documentation 2 shows when the transmission at usual frame and fault detected in receiving, but do not consider the Lookup protocol of the supervisory frame that periodic sends and receives or equipment.

Summary of the invention

Make the present invention under the circumstances, the object of this invention is to provide communication equipment, communication system, method to set up, setting program and circuit is set, the supervisory frame that can send by means of only periodic and receive carrys out automatic configuration information as Maintenance Entity endpoint device, without the need to the frame defined especially, and can realize simplifying circuit and reducing costs.

In order to realize this object, communication equipment according to the present invention is a kind of communication equipment for communication system, described communication system by sending every the scheduled time and receiving the supervision that supervisory frame performs network state between Maintenance Entity endpoint device, described communication equipment comprises: receiving system, receives described supervisory frame; Management table, manages the identification information of the described Maintenance Entity endpoint device of the transmission source as described supervisory frame; And calling mechanism, when the identification information of the Maintenance Entity endpoint device of the transmission source of the supervisory frame received as described receiving system unregistered in described management table, by the registration of the identification information of described Maintenance Entity endpoint device to described management table.

In addition, communication system according to the present invention is a kind of communication system, by sending between Maintenance Entity endpoint device every the scheduled time and receiving the supervision that supervisory frame performs network state, at least one communication equipment in described communication system comprises: receiving system, receives described supervisory frame; Management table, manages the identification information of the described Maintenance Entity endpoint device of the transmission source as described supervisory frame; And calling mechanism, when the described identification information of the described Maintenance Entity endpoint device of the transmission source of the supervisory frame received as described receiving system unregistered in described management table, by the registration of the described identification information of described Maintenance Entity endpoint device to described management table.

In addition, method to set up according to the present invention is the method to set up in a kind of communication system, described communication system by sending every the scheduled time and receiving the supervision that supervisory frame performs network state between Maintenance Entity endpoint device, at least one communication equipment in described communication system comprises: management table, manage the identification information as the described Maintenance Entity endpoint device of the transmission source of described supervisory frame, described method to set up comprises: communication equipment receives described supervisory frame; And the identification information of the Maintenance Entity endpoint device of the transmission source of the supervisory frame received in as described receiving step unregistered in described management table, by described to management table for the described identification information registration of described Maintenance Entity endpoint device.

In addition, a kind of setting program according to the present invention is the setting program of the communication equipment for communication system, described communication system by sending every the scheduled time and receiving the supervision that supervisory frame performs network state between Maintenance Entity endpoint device, described communication equipment comprises: management table, manage the identification information as the described Maintenance Entity endpoint device of the transmission source of described supervisory frame, described setting program comprises the instruction making the computer of communication equipment perform following steps: receive described supervisory frame; And when the identification information of the Maintenance Entity endpoint device of the transmission source of the supervisory frame received as receiving step unregistered in described management table, by the registration of the described identification information of described Maintenance Entity endpoint device to described management table.

In addition, according to of the present invention a kind of arrange circuit be for communication system communication equipment circuit is set, described communication system by sending every the scheduled time and receiving the supervision that supervisory frame performs network state between Maintenance Entity endpoint device, the described circuit that arranges comprises: receiving system, receives described supervisory frame; Management table, manages the identification information of the described Maintenance Entity endpoint device of the transmission source as described supervisory frame; And calling mechanism, when the identification information of the Maintenance Entity endpoint device of the transmission source of the supervisory frame received as described receiving system unregistered in described management table, by the registration of the described identification information of described Maintenance Entity endpoint device to described management table.

Therefore, according to the present invention, the supervisory frame that can send by means of only periodic and receive carrys out automatic configuration information as Maintenance Entity endpoint device, without the need to the frame defined especially.In addition, can realize simplifying circuit and reducing costs.

Accompanying drawing explanation

Fig. 1 shows the block diagram of the configuration example of the ethernet communication equipment 011 as illustrated embodiments of the invention;

Fig. 2 shows the view of the example of the information stored in Ethernet OAM table 013;

Fig. 3 is the view of the example of IEEE 802.1Q untagged frame;

Fig. 4 shows the view of the example of IEEE 802.1Q marker frame;

Fig. 5 shows the view of the content of the data field 033 of Fig. 3 and the data field 043 of Fig. 4;

Fig. 6 shows the view of the details of the label field 053 of Fig. 5;

Fig. 7 shows the flow chart of the process of self the CCM frame differentiated in Ethernet OAM processing section 012;

Fig. 8 shows the flow chart of the handling process of the automatic registration of the MEP according to this example embodiment;

Fig. 9 shows the information rewriting that stores to the figure of the example 1 of Ethernet OAM table 013;

Figure 10 shows the figure of the state transitions of each MEP according to this example embodiment;

Figure 11 shows the information rewriting that stores to the figure of the example 2 of Ethernet OAM table 013;

Figure 12 shows the information rewriting that stores to the figure of the example 3 of Ethernet OAM table 013;

Figure 13 shows the flow chart of the handling process of the automatic registration of the MEP according to this example embodiment;

Figure 14 shows the figure of the state transitions of each MEP according to another example embodiment; And

Figure 15 shows the figure of the example of the setting of ME and MEP in usual Ethernet OAM.

Embodiment

Next, describe example embodiment in detail with reference to accompanying drawing, wherein, according to communication equipment of the present invention, method to set up, setting program with arrange circuit application in the ethernet communication equipment of operation Ethernet OAM frame.

The feature of this example embodiment is, automatically registers the MEP being used for operating Ethernet OAM frame to ethernet communication equipment.In addition, another feature of this example embodiment automatically deletes the MEP of registration.

Therefore, in this exemplary embodiment, the Ethernet OAM frame for equipment of itself can be extracted from the frame flowed in a network, and based on the frame information of frame, MEP be registered automatically to ethernet communication equipment.

In addition, when can also not receive within preset time for equipment of itself Ethernet OAM frame, the MEP of registration is automatically deleted.

The basic configuration of following this example embodiment of description.

Y.1731 or the Ethernet OAM function that specifies of IEEE 802.1ag in order to operate ITU-T, need MEP registration to ethernet communication equipment.

Fig. 1 shows the block diagram of the inside of the ethernet communication equipment 011 as illustrated embodiments of the invention.Arrow represents the flowing of ethernet frame.

In order to operate Ethernet OAM function, ethernet communication equipment is configured by Ethernet OAM processing section 012, Ethernet OAM table 013 and MAC Address memory 014 usually.The processing method arranging switch 015 (as DIP switch) and the execution of change Ethernet OAM processing section 012 by adding MEL (MEG grade) realizes the present invention.

Fig. 2 shows the example of the information stored in Ethernet OAM table 013.ETH-CC (Ethernet can be performed based on this table information ^tMcontinuity check), and send between the MEP of registration to ethernet communication equipment and receive CCM (continuity check message) frame.Frame format in ethernet communication is specified by IEEE.Fig. 3 shows the example of IEEE 802.1Q untagged frame, and Fig. 4 shows the example of IEEE 802.1Q marker frame.CCM frame format by ITU-T Y.1731 or IEEE802.1ag specify.The content of the data field 033 of Fig. 3 and the data field 043 of Fig. 4 as shown in Figure 5.The label field 053 of Fig. 5 specifically illustrates in figure 6.

Fig. 7 and Fig. 8 shows the handling process in the present invention carried out Ethernet OAM processing section 012.This handling process is illustrated as the flow process carrying out processed frame for each reception of frame.In addition, Figure 10 shows the figure of state transitions this moment.Fig. 9,11 and 12 shows the information rewriting that stores to the example of Ethernet OAM table 013.Figure 13 shows the handling process of another example embodiment, and Figure 14 shows its state transition diagram.

Following configuration and the operation specifically describing this example embodiment with reference to Fig. 1 and 2.

On the ethernet communication equipment 011 shown in Fig. 1, ethernet frame flows in the direction of the arrow.Receive frame, ethernet communication equipment 011 processes the frame of reception in Ethernet OAM processing section 012 at every turn.This moment, use Ethernet OAM table 013, MAC Address memory 014 and MEL that the corresponding information of switch 015 is set.

Fig. 2 shows the example of the information stored in Ethernet OAM table 013.In order to the MEP registration in the Ethernet OAM function that specified by ITU-TY.1731 or IEEE802.1ag is to ethernet communication equipment, need the Ethernet OAM table that configures in ethernet communication equipment 011 as shown in Figure 2, and by each information initial setting up to the Ethernet OAM table of each ethernet communication equipment in network.

The information content in Ethernet OAM table shown in Fig. 2 is example.For each MEP entry (identification information) (frame number for Ethernet OAM table 013), association and the information stored as MEL, MEGID, cycle, MEP ID and reciprocity MEP ID and so on.Based on this information, the ETH-CC function of Ethernet OAM function becomes and can operate.ETH-CC function is by sending mutually CCM frame with given interval and check the reception of CCM frame at corresponding MEP place between two or more MEP, check communication lines by the function of normality.

In addition, Ethernet OAM processing section 012, based on the information content of Ethernet OAM table 013, identifies the transmission source MEP of the CCM frame of reception by the MEP entry be associated with the information content.

MAC Address memory 014 stores the MAC Address of the equipment of itself that IEEE specifies.There is not identical address in network, MAC Address is the value unique to equipment.

MEL arranges switch 015 and arranges the MEL value that ethernet communication equipment 011 can process.When receive have be equal to or less than MEL the frame of MEL value of the value that switch 015 is arranged is set time, process this frame.When frame has the value being greater than settings, send this frame and do not process.

The operation of following this example embodiment of description.Fig. 7 shows Ethernet OAM processing section 012 for differentiating the flow process of equipment of itself CCM frame.

When receiving frame, the handling process of Ethernet OAM processing section 012 according to Fig. 7 shown in Fig. 1 differentiates equipment of itself CCM frame at every turn.

When receiving frame, in DA (destination-address) field (031 of received frame, 041) when consistent with the MAC Address stored in MAC Address memory 014 (treatment step 071), or in the da field (031 of received frame, 041), when multicast address classification 1 address specified with IEEE is consistent (treatment step 072), Ethernet OAM processing section 012 proceeds to next treatment step 073.

When address above mentioned in da field and treatment step 071 or 073 is all inconsistent, Ethernet OAM processing section 012 determines that received frame is not equipment of itself CCM frame, and does not perform any process (treatment step 076).

At treatment step 073, check whether the type field (032,042) of received frame comprises the value 0x8902 for Ethernet OAM of IEEE regulation.In treatment step 073, the value of type field is consistent with value 0x8902, Ethernet OAM processing section 012 proceeds to next treatment step 074, and when the value of type field is not consistent with it, Ethernet OAM processing section 012 determines that received frame is not equipment of itself CCM frame, and does not perform any process (process steps 076).

In treatment step 074, check whether received frame is CCM frame.Such as, by check the value of the OpCode field (052) of received frame be whether ITU-T Y.1731 or the value 0x01 of CCM frame that specifies of IEEE802.1ag, determine whether received frame is CCM frame.

In treatment step 074, received frame is CCM frame, Ethernet OAM processing section 012 determines that received frame is equipment of itself CCM frame, and proceed to next handling process (Fig. 8) (treatment step 075), and when received frame is not CCM frame, Ethernet OAM processing section 012 determines that received frame is not equipment of itself CCM frame, and does not perform any process (treatment step 076).

Fig. 8 shows the handling process automatically registering MEP according to this example embodiment.Exemplarily, will the situation arranging content of Ethernet OAM table 013 as shown in Figure 9 be described.In addition, Figure 10 shows the state transition diagram in process sequence.

In the example depicted in fig. 9,4 MEP can be registered, and register 1 MEP.As MEP entry, register MEP1 (091), and not yet registered MPE2 (092), MEP3 (093) and MEP4 (094).

Assuming that the configuration information of MEP1 (091) comprising: MEL=5 (091-1); MEGID=MEG0000000001 (091-2); cycle=1s (second) (093-1); MEP ID=1000 (091-4); equity MEP ID=1001 (091-5); receive number of times A=3 time (091-6), protection timer B=0 second (091-7) and enrollment status=registration (091-8).MEP2 (092), MEP3 (093) and MEP4 (094) not yet register, and its enrollment status is " unregistered " (092-8,093-8,094-8).

MEP entry has enrollment status (091-8,092-8,093-8,094-8) respectively, and the enrollment status of each MEP entry shifts as shown in the state transition diagram of Figure 10.State after transfer as shown in the state transition diagram of Figure 10 is stored to Ethernet OAM table 013, and corresponds to the enrollment status (091-8,092-8,093-8,094-8) in Fig. 9.

In the example depicted in fig. 9, MEP1 is in state " registration " (103), and " registration " (091-8) is stored to Ethernet OAM table 013 as the enrollment status of MEP1.MEP2 (092), MEP (093) and MEP4 (094) are in state " unregistered " (101), " unregistered " (092-8,093-8,094-8) be stored to Ethernet OAM table 013 as the enrollment status of MEP2, MEP3 and MEP4.Corresponding enrollment status represents following state.

As the enrollment status of MEP entry, there is three state: unregistered (101); Interim registration (102); And registration (103).

" unregistered " state (101) represents that MEP not yet registers and can register from now on the state of MEP.The MEP entry being in " unregistered " state (101) does not perform and checks or the transmission of CCM frame, the inoperation of ETH-CC function.

" registration " state (103) represents the state that MEP has registered.The MEP entry being in " registration " state (103), based on the information arranged in Ethernet OAM table 013, performs and checks the transmission with CCM frame, the complete operation of ETH-CC function.In addition, other Ethernet OAM function also can operate, as ETH-LB (Ethernet Loopback) and ETH-LT (ethernet link tracking) function.

" register " state of state (102) expression from the time period that " unregistered " state (101) to " enrollment status " (103) shifts temporarily.The MEP entry being in " temporarily registering " state (102) only performs checking of CCM frame based on the information arranged in Ethernet OAM table 013.

For the MEP be not yet registered in Ethernet OAM table 013, when receiving new CCM frame, the arbitrary MEP entry being in " unregistered " state (101) is selected in Ethernet OAM processing section 012, and makes its state transitions to " registering " state (102) temporarily.

" temporarily register " state (102) is the equipment of itself CCM frame that prevents the enrollment status of MEP entry from sending based on mistake and is transferred to " registration " state (103) necessary state immediately.After repeatedly receiving the new CCM frame for the MEP be not yet registered in Ethernet OAM table 013, enrollment status is transferred to " registration " (103) from " registering " (102) temporarily.

Be defined as from the reception number of times needed for the state transitions of " register " (102) to " registration " (103) temporarily and protect number of times K (registration threshold value).Protection number of times K is the value being initially set to fixed value for ethernet communication equipment 011.Such as, when protecting number of times K to be " 3 times ", for the transfer from " registering " state (102) to " registration " state (103) temporarily, need to receive identical CCM frame 3 times.The reception number of times of identical CCM frame not yet reaches protects the transfering state of number of times K to be " temporarily registering " state (102).

In addition, arrange and use the parameter of protection timer B, automatically to delete the MEP of registration.When the enrollment status of MEP entry is " registration " and " registering " temporarily, for each rewriting time period T pre-set, the protection timer B of MEP entry is rewritten as value B+T.

Such as; when the time period, T was set to 1s in rewriting; read every the 1s time period value that enrollment status in Ethernet OAM table 013 is the protection timer T of all MEP entries of " registration " and " temporarily registering ", and be rewritten as by 1s and B value is added the value as new B value obtained.Rewriteeing time period T is the value being initially set to fixed value for ethernet communication equipment 011.

In addition, when each reception is the CCM frame of the MEP of " registration " and " temporarily registering " for enrollment status, the value of the protection timer B of MEP entry is rewritten, to remove to 0s.When no longer receiving the CCM frame for MEP, not removing protection timer, and constantly increasing.But, by initial setting up timer overflow value (deletion threshold value), when protecting timer B to reach timer overflow value, delete the registration of MEP.Can by the enrollment status of MEP entry in Ethernet OAM table 013 being rewritten as " unregistered " to perform the deletion of MEP registration.

As shown in Figure 10, the state transitions when protecting timer B to reach timer overflow value comprises from " registration " (103) to the state transitions of " unregistered " (101) and the state transitions from " registering " (102) to " unregistered " (101) temporarily.State after transfer is stored to Ethernet OAM table 013, and by " unregistered " state (101) write Ethernet OAM table 013 as enrollment status information, result deletes the MEP of MEP entry.Timer overflow value is also the value being previously set to fixed value for ethernet communication equipment 011.

Following reference Fig. 8 describes the handling process according to the automatic registration of the MEP of this example embodiment.For the received frame being confirmed as equipment of itself CCM frame in the handling process of Fig. 7, the ethernet communication equipment 011 of this example embodiment operates according to the handling process of Fig. 8.

The value of the MEL field (051) of received frame and MEL are arranged the equipment of itself MEL value that switch 015 arranges and compare (treatment step 081) by Ethernet OAM processing section 012, and proceed to next treatment step 082 when the value of MEL field is equal to or less than equipment of itself MEL value, and terminate when the value of MEL field is greater than equipment of itself MEL value and do not perform any process.

At treatment step 082, the corresponding information that the enrollment status in the respective field value of received frame and Ethernet OAM table 013 is all MEP entries of " registration " or " temporarily registering " by Ethernet OAM processing section 012 compares.Exemplarily illustrate in fig .9, enrollment status is that the MEP entry of " registration " or " temporarily registering " only has MEP1 (091).Therefore, in this case, Ethernet OAM processing section 012 only compares the corresponding information of MEP1 (091).The value of Ethernet OAM processing section 012 by the MEL field (051) of received frame and the MEL=5 (091-1) of MEP1, the value of the MEG id field (055) of received frame and MEP1=MEG0000000001 (091-2), and the period field of received frame (061) and MEP1 cycle=1s (091-3) compares.

Ethernet OAM processing section 012 checks whether to there is its value MEP entry (treatment step 083) all consistent with the value of received frame, and when the MEP entry that its value of existence is all consistent with the value of received frame, proceed to treatment step 085, and when there is not its value MEP entry all consistent with the value of received frame, proceed to treatment step 084.When Ethernet OAM processing section 012 proceeds to treatment step 084, can determine that received frame is not the CCM frame for the MEP of registration in Ethernet OAM table 013, but for the CCM frame of equipment of itself, thus MEP is newly registered to Ethernet OAM table 013.

The value of the MEL field (051) of the respective field value as received frame be 4, the value of MEG id field (055) is MEG0000000002, the value of period field (061) is 10ms, when the value of MEP id field (054) is 2001, as shown in the example of Figure 11, upgrade the content of Ethernet OAM table 013.In other words, the respective field value of received frame is stored as the information (112-1 to 112-8) be associated with the MEP2 of MEP entry (112).

Here, the value due to the MEP id field (054) of received frame is the MEP ID value of the frame that the MEP by communicating sends, and is therefore stored as the reciprocity MEP ID value (112-5) of MEP2 (112).MEP ID value (112-4) in table is the MEP ID of equipment of itself, stores the fixing value of equipment.Fig. 2, the example of the table shown in 9,11 and 12 shows the situation that MEP ID value is fixed as 1000.

As reception number of times A (the reception number of times of the MEP entry that its value is consistent), when MEP is new registration, store " once " (112-6).As protection timer B, when MEP is new registration, store " 0s " (112-7).Owing to receiving the new CCM frame for unregistered MEP, enrollment status is transferred to " temporarily registering " state (102) shown in state transition diagram of Figure 10, and " temporarily registration " (112-8) is stored Ethernet OAM table 013.

When again receiving identical CCM frame in this interim enrollment status, Ethernet OAM processing section 012 proceeds to treatment step 082, because determine "Yes" as mentioned above in treatment step 081.Owing to there is the MEP entry that two MEP (comprising MEP1 (111) and MEP2 (112)) are " registration " or " register " as enrollment status temporarily, the respective field value of received frame compares to the corresponding register information of two MEP entries by Ethernet OAM processing section 012.

All values due to the MEL field (051) of received frame, MEG id field (055) and period field (061) is different from as the MEL value (111-1) of the register information of MEP1, MEG ID value (111-2) and periodic quantity (111-3), can determine that received frame is not the frame for MEP1.Because the MEL value (112-1) of all values and the register information as MEP2, MEG ID value (112-2) and periodic quantity (112-3) are consistent, in treatment step 083, can determine to there is all consistent MEP entry of its value, Ethernet OAM processing section 012 proceeds to treatment step 085.

In treatment step 085, the reciprocity MEP ID value (112-5) of the value of the MEP id field (054) of received frame with MEP2 (the MEP entry that in treatment step 083, its value is all consistent) is compared.Because the information content is consistent, can determine to there is consistent MEP entry in treatment step 086, and Ethernet OAM processing section 012 proceeds to next treatment step 087.If receive inconsistent frame, then proceed to treatment step 084.

In treatment step 087, the reception number of times A of MEP2 (being defined as consistent MEP entry in step 086) and the protection number of times K unique to equipment are compared.When protecting number of times K to be set to " 3 times ", the reception number of times A of MEP2 is 1 time (112-6), inconsistent with protection number of times K=3 time, thus Ethernet OAM processing section 012 proceeds to treatment step 088.In treatment step 088, the reception number of times A (112-6) of consistent MEP entry is rewritten as value A+1, and timer B (112-7) will be protected to reset.State (112-8) that enrollment status keeps " registering " temporarily.Other values (112-1 to 112-5) keep identical value.

Under the state that enrollment status is " registering " temporarily and the reception number of times A of MEP2 is " 2 times ", when receiving same number of frames again, in treatment step 088, the reception number of times A of MEP2 is rewritten as " 3 times ", and timer B will be protected to remove to " 0s ".

Therefore, when receiving two frames after interim registration, in treatment step 088, the reception number of times A of MEP2 is rewritten as " 3 times ", and timer B will be protected to remove to " 0s ".

Under the state that enrollment status is " registering " temporarily and the reception number of times A of MEP2 is " 3 times "; when receiving same number of frames again; Ethernet OAM processing section 012 proceeds to treatment step 089; because the reception number of times A of MEP2 is " 3 times ", consistent with to the protection number of times K of the unique MEP2 of equipment.

In treatment step 089, enrollment status be updated to " registration " (112-8) and store.The state transition diagram of Figure 10 describes in order to reference; under the enrollment status of " temporarily registering " (102); receive number of times A " 3 times " and meet protection number of times K " 3 times "; and the CCM frame received for the MEP2 as MEP, make enrollment status be transferred to " registration " (103).Protection timer B removes to " 0s ".Other values (122-1 to 122-6) of MEP2 remain unchanged.

When receiving identical CCM frame after be updated to " registration " (112-8) at enrollment status; in treatment step 089; timer B will be protected to remove to " 0s " (122-7), and other values (122-1 to 122-6,122-8) remain unchanged.The MEP2 that enrollment status is updated to " registration " (122-8) is based on the information arranged in Ethernet OAM table 013, perform and check the transmission with CCM frame, make the complete operation of ETH-CC function, other Ethernet OAM function (as ETH-LB function and ETH-LT function) also become and can operate.

Therefore, according to above-mentioned example embodiment, the register information of the MEP operated for Ethernet OAM can be registered automatically the ethernet communication equipment to the MEP position being arranged in ME.In addition, the registration of MEP is automatically deleted when can also not receive the Ethernet OAM frame for equipment of itself within preset time.

In addition, due to automatically MEP can be registered, do not need to ethernet communication equipment configuration for arranging interface and the CPU of register information, and circuit size can be made less, power consumption and cost can also be reduced.

In addition, owing to automatically can registering and automatically deleting MEP, can prevent from arranging ethernet communication equipment mistakenly.Therefore, become and be easy to add/reduce ethernet communication equipment to/from Operation Network.

In addition, according to above-mentioned example embodiment, owing to only using the information of specific supervisory frame (i.e. ITU-TY.1731 or IEEE 802.1ag specify CCM frame), can determine whether MEP is registration target by simple procedure.Therefore, circuit size can be made less, power consumption and cost can also be reduced.

In addition, automatically register due to the CCM frame being sent by periodic and receive and automatically delete MEP and be embodied as Ethernet OAM, there is no need for the new circuit sending and receive the frame of special definition, circuit size can be made less, power consumption and cost can also be reduced.In addition, newly do not send or receive the frame of special definition, do not increase traffic carrying capacity, the automatic registration of MEP can be performed and automatically delete.

Usually, about Ethernet OAM operation by ITU-T Y.1731 or IEEE 802.1ag specify, arranging of operation is numerous and complicated.In addition, in each ME between MEP CCM frame transmission and receive not only one to one, perform with going back one-to-many, can in the mesh network multi-to-multi ground perform.

According to above-mentioned example embodiment, can by means of only at least one the ethernet communication equipment of MEP being registered to the MEP position being arranged in ME, Lookup protocol MEP registers the MEP position to another ethernet communication equipment.Therefore, applicability significantly increases.In addition, circuit size diminishes, thus causes power consumption and cost to reduce.

Above-mentioned respective examples embodiment is preferred exemplary embodiment of the present invention, but is not limited thereto, and can realize the present invention with changing in every way based on technological thought of the present invention.

Such as, the content of Ethernet OAM table 013 can be different from foregoing, as long as can perform the automatic registration of MEP and automatically delete.In addition, value and configuration can from operate describe in the value that exemplarily uses with configure different, etc.

In addition, MEL arranges switch 015 and is not limited to DIP switch, can be can according to any switch arranging change.In addition, unalterable switch (as when the value of fixing equipment) is also allowed.In addition, about the parameter being described as the value be set in advance as equipment fixed value, allow according to the switch arranging change, also to allow owing to fixing and unalterable switch equipment.

In addition, the situation of state (102) that the present invention can also be applied to does not need in the transfer from " unregistered " state (101) to " registration " state (103) " registering " temporarily.In this case, receive number of times A and protect number of times K to be unwanted value.In addition, utilize Figure 13 to carry out the handling process of alternate figures 8, utilize Figure 14 to carry out the state transition diagram of alternative Figure 10.Because these figure all do not need " registering " state (102) temporarily, do not use in the drawings and receive number of times A and protection number of times K, other guide is identical with above-mentioned Fig. 8 with Figure 10.

In addition, in above-mentioned example embodiment, in treatment step 081 in the handling process of Fig. 8, the value of the MEL field (051) of received frame and MEL are arranged the equipment of itself MEL value that switch 015 arranges and compare by Ethernet OAM processing section 012, and proceed to next treatment step 082 when the value of MEL field (051) is equal to or less than equipment of itself MEL value, and terminate when the value of MEL field (051) is greater than equipment of itself MEL value and do not perform any process.Process in treatment step 081 can replace with following process: the value of the MEL field (051) of received frame and MEL are arranged the equipment of itself MEL value that switch 015 arranges and compare, and proceed to next treatment step 082 when the value of MEL field (051) is consistent with equipment of itself MEL value, and the value of MEL field (051) and equipment of itself MEL value inconsistent time, terminate and do not perform any process.

In this case, process received frame when MEL arranges switch 015 for having a MEL value of settings at frame, and when frame has the MEL value being different from settings transmission and reception frame and not processing.

In addition, in the above description, after automatically registering MEP, other Ethernet OAM function, as ETH-LB function and ETH-LT function become available, but also allow before registration MEP, the operation that the message frame (as LBM loopback message frame and LTM Link Trace messages frame) of equipment of itself MEL value that switch 015 arranges carries out sending it back multi-frame is set corresponding to being equal to or less than MEL.

In addition, as described above with reference to Figure 15, due to multiple MEL (MEG grade) can be arranged in the network using Ethernet OAM function, an ethernet communication equipment is equipped with the function of Maintenance Entity endpoint device (MEP) and the function of Maintenance Intermediate Point equipment (MIP), or only can be equipped with the function of Maintenance Entity endpoint device (MEP), maybe can be equipped with the function of Maintenance Intermediate Point equipment (MIP).

In addition, the equipment not arranging MEP can comprise in a network, and in this case, equipment sends all Ethernet OAM frames.

In addition, as above-mentioned example embodiment ethernet communication equipment can FPGA's (field programmable gate array) arrange each function that circuit realizes above-mentioned example embodiment by utilizing, or implementation can be carried out by processing unit (as CPU) based on program, to realize each function of above-mentioned example embodiment.

Therefore, by the process of the process using being used for the ethernet communication equipment realized as above-mentioned example embodiment as program record on the recording medium, by making the CPU of computer, system configuration can be performed process, to realize above-mentioned corresponding function of the present invention for utilizing the program provided from recording medium.

In this case, the present invention is also applied to following situation: the information group comprising program is provided to output equipment from aforementioned recording medium or via network from external recording medium.

In other words, the program code read from recording medium realizes New function of the present invention, program code stored recording medium and the signal configures the present invention read from recording medium.

As this recording medium, such as, can use hard disk, CD, magnetooptical disc, floppy disk, tape, Nonvolatile memory card, ROM etc.

According to program according to the present invention and control circuit, programme controlled communication equipment can be made and each function in the above-mentioned example embodiment of circuit realiration is set.

[complementary annotations]

The all or part of of above-mentioned example embodiment can be described as but be not limited to following complementary annotations.

(complementary annotations 1)

For a communication equipment for communication system, described communication system by sending every the scheduled time and receiving the supervision that supervisory frame performs network state between Maintenance Entity endpoint device, and described communication equipment comprises:

Receiving system, receives described supervisory frame;

Management table, manages the identification information of the described Maintenance Entity endpoint device of the transmission source as described supervisory frame; And

Calling mechanism, when the described identification information of the described Maintenance Entity endpoint device of the transmission source of the described supervisory frame received as described receiving system unregistered in management table, by the registration of the described identification information of described Maintenance Entity endpoint device to described management table.

(complementary annotations 2)

Communication equipment according to complementary annotations 1, comprising:

Timing device, about each identification information of the Maintenance Entity endpoint device registered in described management table, measures the time in the past after Maintenance Entity endpoint device that described receiving system identifies from described identification information receives supervisory frame; And

Delete device, about at least arbitrary identification information of the described Maintenance Entity endpoint device registered in described management table, even if be equal to or greater than predetermined deletion threshold value when the time in the past measured by described timing device becomes, when the Maintenance Entity endpoint device identified from described identification information not yet receives supervisory frame, delete the described identification information of described Maintenance Entity endpoint device from described management table.

(complementary annotations 3)

Communication equipment according to complementary annotations 2, wherein:

The time correlation in the past that the described identification information of described Maintenance Entity endpoint device and described timing device are measured about Maintenance Entity endpoint device by described management table stores with joining; And

Described calling mechanism, based on the time in the past stored in described management table, determines that the time in the past that described timing device is measured about each Maintenance Entity endpoint device is equal to or greater than described predetermined deletion threshold value.

(complementary annotations 4 ')

Communication equipment according to any one of complementary annotations 1 to 3, wherein, unregistered in described management table and when being equal to or greater than described predetermined registration threshold value from the number of times that described Maintenance Entity endpoint device receives supervisory frame at the described identification information of the described Maintenance Entity endpoint device of the transmission source of the supervisory frame received as described receiving system, described calling mechanism by the described identification information of described Maintenance Entity endpoint device with enrollment status registration to described management table.

(complementary annotations 4)

Communication equipment according to any one of complementary annotations 1 to 3, wherein:

When the described identification information of the described Maintenance Entity endpoint device of the transmission source of the supervisory frame received as described receiving system is not included in described management table, the described identification information of Maintenance Entity endpoint device is registered with interim enrollment status by described calling mechanism;

To be registered in described management table with interim enrollment status at the described identification information of the described Maintenance Entity endpoint device of the transmission source of the supervisory frame received as described receiving system and the number of times receiving supervisory frame from described Maintenance Entity endpoint device is less than described predetermined registration threshold value, described calling mechanism will the described identification information of described Maintenance Entity endpoint device be registered with interim enrollment status; And

To be registered in described management table with interim enrollment status at the described identification information of the described Maintenance Entity endpoint device of the transmission source of the supervisory frame received as described receiving system and the number of times receiving supervisory frame from described Maintenance Entity endpoint device is equal to or greater than described predetermined registration threshold value, the described identification information of described Maintenance Entity endpoint device is registered with enrollment status by described calling mechanism.

(complementary annotations 5)

Communication equipment according to complementary annotations 4, wherein:

The described identification information of described Maintenance Entity endpoint device and the number of times receiving supervisory frame from described Maintenance Entity endpoint device store by described management table explicitly; And

Described calling mechanism, based on the reception number of times stored in described management table, determines the enrollment status of the described identification information of the described Maintenance Entity endpoint device of the transmission source registering the supervisory frame received as described receiving system.

(complementary annotations 6)

A kind of communication system, by sending between Maintenance Entity endpoint device every the scheduled time and receiving the supervision that supervisory frame performs network state, at least one communication equipment in wherein said communication system comprises:

Receiving system, receives described supervisory frame;

Management table, manages the identification information of the Maintenance Entity endpoint device of the transmission source as described supervisory frame; And

Calling mechanism, when the identification information of the Maintenance Entity endpoint device of the transmission source of the supervisory frame received as described receiving system unregistered in described management table, by the registration of the identification information of described Maintenance Entity endpoint device to described management table.

(complementary annotations 7)

Communication system according to complementary annotations 6, wherein, described communication equipment comprises:

Timing device, about each identification information of the described Maintenance Entity endpoint device registered in described management table, measures the time in the past after Maintenance Entity endpoint device that described receiving system identifies from described identification information receives supervisory frame; And

(complementary annotations 8)

Communication system according to complementary annotations 7, wherein:

The time correlation in the past that the described identification information of described Maintenance Entity endpoint device and described timing device are measured about described Maintenance Entity endpoint device stores by described management table with joining; And

Described calling mechanism, based on the time in the past stored in described management table, determines that the time in the past that described timing device is measured about each Maintenance Entity endpoint device is equal to or greater than predetermined deletion threshold value.

(complementary annotations 9)

Communication system according to any one of complementary annotations 6 to 8, wherein:

When the identification information of the Maintenance Entity endpoint device of the transmission source of the supervisory frame received as described receiving system is not included in described management table, the identification information of Maintenance Entity endpoint device is registered with interim enrollment status by described calling mechanism;

To be registered in described management table with interim enrollment status at the described identification information of the described Maintenance Entity endpoint device of the transmission source of the supervisory frame received as described receiving system and the number of times receiving supervisory frame from described Maintenance Entity endpoint device is less than predetermined registration threshold value, described calling mechanism will the described identification information of described Maintenance Entity endpoint device be registered with interim enrollment status; And

(complementary annotations 10)

Communication equipment according to complementary annotations 9, wherein:

(complementary annotations 11)

Method to set up in a kind of communication system, described communication system by sending every the scheduled time and receiving the supervision that supervisory frame performs network state between Maintenance Entity endpoint device, at least one communication equipment in described communication system comprises: management table, manage the identification information as the described Maintenance Entity endpoint device of the transmission source of described supervisory frame, described method to set up comprises:

Described communication equipment receives described supervisory frame; And

The identification information of the described Maintenance Entity endpoint device of the transmission source of the supervisory frame received in as described receiving step unregistered in described management table, by the registration of the identification information of described Maintenance Entity endpoint device to described management table.

(complementary annotations 12)

Method to set up according to complementary annotations 11, comprising:

About each identification information of the Maintenance Entity endpoint device registered in described management table, measure the time in the past after Maintenance Entity endpoint device that described receiving step identifies from described identification information receives supervisory frame; And

About at least arbitrary identification information of the Maintenance Entity endpoint device registered in described management table, even if be equal to or greater than predetermined deletion threshold value when the time in the past measured by described timed step becomes, when the described Maintenance Entity endpoint device identified from described identification information not yet receives supervisory frame, delete the described identification information of described Maintenance Entity endpoint device from described management table.

(complementary annotations 13)

Method to set up according to complementary annotations 12, wherein:

The time correlation in the past that the described identification information of described Maintenance Entity endpoint device and described timed step are measured about described Maintenance Entity endpoint device stores by described management table with joining; And

When registering, based on the time in the past stored in described management table, determine that the time in the past that described timed step is measured about each Maintenance Entity endpoint device is equal to or greater than predetermined deletion threshold value.

(complementary annotations 14)

Method to set up according to any one of complementary annotations 11 to 13, wherein, when registering:

When the described identification information of the described Maintenance Entity endpoint device of the transmission source of the described supervisory frame received as described receiving step is not included in described management table, the described identification information of described Maintenance Entity endpoint device is registered with interim enrollment status;

To be registered in described management table with interim enrollment status at the described identification information of the described Maintenance Entity endpoint device of the transmission source of the described supervisory frame received as described receiving step and the number of times receiving supervisory frame from described Maintenance Entity endpoint device is less than predetermined registration threshold value, will the described identification information of described Maintenance Entity endpoint device register with interim enrollment status; And

To be registered in described management table with interim enrollment status at the identification information of the described Maintenance Entity endpoint device of the transmission source of the described supervisory frame received as described receiving step and the number of times receiving supervisory frame from described Maintenance Entity endpoint device is equal to or greater than described predetermined registration threshold value, the identification information of described Maintenance Entity endpoint device is registered with enrollment status.

(complementary annotations 15)

Method to set up according to complementary annotations 14, wherein:

When registering, based on the reception number of times stored in described management table, determine the enrollment status of the described identification information of the described Maintenance Entity endpoint device of the transmission source registering the described supervisory frame received as described receiving step.

(complementary annotations 16)

A kind of setting program of the communication equipment for communication system, described communication system by sending every the scheduled time and receiving the supervision that supervisory frame performs network state between Maintenance Entity endpoint device, described communication equipment comprises: management table, manage the identification information as the Maintenance Entity endpoint device of the transmission source of described supervisory frame, described setting program comprises the instruction making the computer of described communication equipment perform following steps:

Receive described supervisory frame; And

When the identification information of the described Maintenance Entity endpoint device of the transmission source of the supervisory frame received as described receiving step unregistered in described management table, by the registration of the described identification information of described Maintenance Entity endpoint device to described management table.

(complementary annotations 17)

Setting program according to complementary annotations 16, comprising:

About each identification information of the described Maintenance Entity endpoint device registered in described management table, measure the time in the past after Maintenance Entity endpoint device that described receiving step identifies from described identification information receives supervisory frame; And

About at least arbitrary identification information of the described Maintenance Entity endpoint device registered in described management table, even if be equal to or greater than predetermined deletion threshold value when the time in the past measured by described timed step becomes, when the Maintenance Entity endpoint device identified from described identification information not yet receives supervisory frame, delete the described identification information of described Maintenance Entity endpoint device from described management table.

(complementary annotations 18)

Setting program according to complementary annotations 17, wherein:

(complementary annotations 19)

Setting program according to any one of complementary annotations 16 to 18, wherein, when registering:

To be registered in described management table with interim enrollment status at the described identification information of the described Maintenance Entity endpoint device of the transmission source of the described supervisory frame received as described receiving step and the number of times receiving supervisory frame from described Maintenance Entity endpoint device is equal to or greater than described predetermined registration threshold value, the described identification information of described Maintenance Entity endpoint device is registered with enrollment status.

(complementary annotations 20)

Setting program according to complementary annotations 19, wherein:

When registering, based on the reception number of times stored in described management table, determine the enrollment status of the identification information of the Maintenance Entity endpoint device of the transmission source registering the supervisory frame received as described receiving step.

(complementary annotations 21)

For communication system communication equipment a circuit is set, described communication system by sending every the scheduled time and receiving the supervision that supervisory frame performs network state between Maintenance Entity endpoint device, and the described circuit that arranges comprises:

Receiving system, receives described supervisory frame;

Calling mechanism, when the described identification information of the described Maintenance Entity endpoint device of the transmission source of the supervisory frame received as described receiving system unregistered in described management table, by the registration of the described identification information of described Maintenance Entity endpoint device to management table.

(complementary annotations 22)

Circuit is set according to complementary annotations 21, comprises:

(complementary annotations 23)

According to complementary annotations 22, circuit is set, wherein:

(complementary annotations 24)

According to any one of complementary annotations 21 to 23, circuit is set, wherein:

When the described identification information of the described Maintenance Entity endpoint device of the transmission source of the supervisory frame received as described receiving system is not included in described management table, the described identification information of described Maintenance Entity endpoint device is registered with interim enrollment status by described calling mechanism;

(complementary annotations 25)

According to complementary annotations 24, circuit is set, wherein:

Although describe the present invention with reference to above-mentioned respective examples embodiment, the invention is not restricted to above-mentioned example embodiment.Within the scope of the invention, can in the various modes that it will be appreciated by those skilled in the art that to change configuration of the present invention and details.

The present invention is based on and require the priority of the Japanese patent application No.2010-083585 that on March 31st, 2010 submits to, its full content is incorporated to herein by reference.

Industrial applicibility

The present invention can be applied to all spectra of the communication equipment using Ethernet OAM.

Label describes

011 ethernet communication equipment

012 Ethernet OAM processing section

013 Ethernet OAM table

014MAC addressed memory

015MEL arranges switch (optimum configurations switch)

Claims

1., for a communication equipment for communication system, described communication system by sending every the scheduled time and receiving the supervision that supervisory frame performs network state between Maintenance Entity endpoint device, and described communication equipment comprises:

Receiving element, receives described supervisory frame;

Registration unit, when the identification information of the Maintenance Entity endpoint device of the transmission source of the supervisory frame received as described receiving element unregistered in described management table, by the registration of the identification information of described Maintenance Entity endpoint device to described management table, wherein

When the described identification information of the described Maintenance Entity endpoint device of the transmission source of the supervisory frame received as described receiving element is not included in described management table, described registration unit is with the described identification information of interim enrollment status registration Maintenance Entity endpoint device;

To be registered in described management table with interim enrollment status at the described identification information of the described Maintenance Entity endpoint device of the transmission source of the supervisory frame received as described receiving element and the number of times receiving supervisory frame from described Maintenance Entity endpoint device is less than predetermined registration threshold value, described registration unit still registers the described identification information of described Maintenance Entity endpoint device with interim enrollment status; And

To be registered in described management table with interim enrollment status at the described identification information of the described Maintenance Entity endpoint device of the transmission source of the supervisory frame received as described receiving element and the number of times receiving supervisory frame from described Maintenance Entity endpoint device is equal to or greater than described predetermined registration threshold value, described registration unit registers the described identification information of described Maintenance Entity endpoint device with enrollment status.

2. communication equipment according to claim 1, comprising:

Timing unit, about each identification information of the described Maintenance Entity endpoint device registered in described management table, measures the time in the past after Maintenance Entity endpoint device that described receiving element identifies from described identification information receives supervisory frame; And

Delete cells, about at least arbitrary identification information of the described Maintenance Entity endpoint device registered in described management table, even if be equal to or greater than predetermined deletion threshold value when the time in the past measured by described timing unit becomes, when the Maintenance Entity endpoint device identified from described identification information not yet receives supervisory frame, from described management table, delete the described identification information of described Maintenance Entity endpoint device.

3. communication equipment according to claim 2, wherein:

The time correlation in the past that the described identification information of described Maintenance Entity endpoint device and described timing unit are measured about described Maintenance Entity endpoint device stores by described management table with joining; And

Described registration unit, based on the time in the past stored in described management table, determines whether the time in the past that described timing unit is measured about each Maintenance Entity endpoint device is equal to or greater than described predetermined deletion threshold value.

4. communication equipment according to claim 1, wherein, unregistered in described management table and when being equal to or greater than predetermined registration threshold value from the number of times that described Maintenance Entity endpoint device receives supervisory frame at the described identification information of the described Maintenance Entity endpoint device of the transmission source of the supervisory frame received as described receiving element, described registration unit by the described identification information of described Maintenance Entity endpoint device with enrollment status registration to described management table.

5. communication equipment according to claim 1, wherein:

Described registration unit, based on the reception number of times stored in described management table, determines the enrollment status of the described identification information of the described Maintenance Entity endpoint device of the transmission source registering the supervisory frame received as described receiving element.

6. the method to set up in a communication system, described communication system by sending every the scheduled time and receiving the supervision that supervisory frame performs network state between Maintenance Entity endpoint device, at least one communication equipment in wherein said communication system comprises: management table, manage the identification information as the described Maintenance Entity endpoint device of the transmission source of described supervisory frame, described method to set up comprises:

Described supervisory frame is received by described communication equipment; And

The identification information of the Maintenance Entity endpoint device of the transmission source of the supervisory frame received in as described receiving step unregistered in described management table, by the described identification information registration of described Maintenance Entity endpoint device to described management table, wherein

When the described identification information of the described Maintenance Entity endpoint device of the transmission source as received supervisory frame is not included in described management table, with the described identification information of interim enrollment status registration Maintenance Entity endpoint device;

To be registered in described management table with interim enrollment status at the described identification information of the described Maintenance Entity endpoint device of the transmission source as received supervisory frame and the number of times receiving supervisory frame from described Maintenance Entity endpoint device is less than predetermined registration threshold value, still register the described identification information of described Maintenance Entity endpoint device with interim enrollment status; And

To be registered in described management table with interim enrollment status at the described identification information of the described Maintenance Entity endpoint device of the transmission source as received supervisory frame and the number of times receiving supervisory frame from described Maintenance Entity endpoint device is equal to or greater than described predetermined registration threshold value, register the described identification information of described Maintenance Entity endpoint device with enrollment status.